When you set up mathematical formulas, you often have to introduce various kinds of local objects or "dummy variables". You can treat such dummy variables using modules and ...

When you set a value to a symbol, that value will be used for the symbol for the entire Mathematica session. Since symbols no longer in use can introduce unexpected errors ...

Any Mathematica symbol can have both a variety of types of values, and a variety of independently settable attributes that define overall aspects of its behavior.

Null is a symbol used to indicate the absence of an expression or a result. It is not displayed in ordinary output. When Null appears as a complete output expression, no ...

$NewSymbol is a global variable which, if set, is applied to the name and context of each new symbol that Mathematica creates.

Introduction to Dynamic Advanced Dynamic Functionality

GeneratedParameters is an option that specifies how parameters generated to represent the results of various symbolic operations should be named.

Modules in Mathematica allow you to treat the names of variables as local. Sometimes, however, you want the names to be global, but values to be local. You can do this in ...

Label[tag] represents a point in a compound expression to which control can be transferred using Goto.

$Aborted is a special symbol that is returned as the result from a calculation that has been aborted.